A timing issue basically means that the time a certain function is executed is what's causing a bug (for instance it could be happening at the same time as something else which could cause the function to hang). This would explain why it doesn't happen when debug logging is on, as that changes the timing of everything.
That's two of you now reporting the issue happens more frequently on machines with slower processors. That makes me wonder if I could reproduce the issue if I restricted my VM's to only one core, and installed EAM. It still wouldn't be a great test, since the CPU in the host system is an AMD Ryzen 7 3800X (meaning the per-core performance is fairly good), but bottlenecking the VM like that may produce similar enough conditions to an older and slower CPU.